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Johannes Bergc2d15602007-07-27 15:43:23 +02001/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * utilities for mac80211
12 */
13
14#include <net/mac80211.h>
15#include <linux/netdevice.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
19#include <linux/etherdevice.h>
20#include <linux/if_arp.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020021#include <linux/bitmap.h>
Johannes Bergd91f36d2009-04-16 13:17:26 +020022#include <linux/crc32.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070023#include <net/net_namespace.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020024#include <net/cfg80211.h>
Johannes Bergdabeb342007-11-09 01:57:29 +010025#include <net/rtnetlink.h>
Johannes Bergc2d15602007-07-27 15:43:23 +020026
27#include "ieee80211_i.h"
Johannes Berg24487982009-04-23 18:52:52 +020028#include "driver-ops.h"
Johannes Berg2c8dccc2008-04-08 15:14:40 -040029#include "rate.h"
Luis Carlos Coboee385852008-02-23 15:17:11 +010030#include "mesh.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020031#include "wme.h"
Johannes Bergf2753dd2009-04-14 10:09:24 +020032#include "led.h"
Johannes Bergfffd0932009-07-08 14:22:54 +020033#include "wep.h"
Johannes Bergc2d15602007-07-27 15:43:23 +020034
35/* privid for wiphys to determine whether they belong to us or not */
36void *mac80211_wiphy_privid = &mac80211_wiphy_privid;
37
Luis R. Rodriguez9a953712009-01-22 15:05:53 -080038struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
39{
40 struct ieee80211_local *local;
41 BUG_ON(!wiphy);
42
43 local = wiphy_priv(wiphy);
44 return &local->hw;
45}
46EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
Johannes Bergc2d15602007-07-27 15:43:23 +020047
Ron Rindjunsky71364712007-12-25 17:00:36 +020048u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
Johannes Berg05c914f2008-09-11 00:01:58 +020049 enum nl80211_iftype type)
Johannes Bergc2d15602007-07-27 15:43:23 +020050{
Harvey Harrisona494bb12008-06-11 14:21:58 -070051 __le16 fc = hdr->frame_control;
Johannes Bergc2d15602007-07-27 15:43:23 +020052
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020053 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
54 if (len < 16)
Johannes Bergc2d15602007-07-27 15:43:23 +020055 return NULL;
56
Harvey Harrisona494bb12008-06-11 14:21:58 -070057 if (ieee80211_is_data(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020058 if (len < 24) /* drop incorrect hdr len (data) */
59 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070060
61 if (ieee80211_has_a4(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020062 return NULL;
Harvey Harrisona494bb12008-06-11 14:21:58 -070063 if (ieee80211_has_tods(fc))
64 return hdr->addr1;
65 if (ieee80211_has_fromds(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020066 return hdr->addr2;
Harvey Harrisona494bb12008-06-11 14:21:58 -070067
68 return hdr->addr3;
69 }
70
71 if (ieee80211_is_mgmt(fc)) {
Ron Rindjunsky98f0b0a2007-12-18 17:23:53 +020072 if (len < 24) /* drop incorrect hdr len (mgmt) */
73 return NULL;
Johannes Bergc2d15602007-07-27 15:43:23 +020074 return hdr->addr3;
Harvey Harrisona494bb12008-06-11 14:21:58 -070075 }
76
77 if (ieee80211_is_ctl(fc)) {
78 if(ieee80211_is_pspoll(fc))
Johannes Bergc2d15602007-07-27 15:43:23 +020079 return hdr->addr1;
Harvey Harrisona494bb12008-06-11 14:21:58 -070080
81 if (ieee80211_is_back_req(fc)) {
Ron Rindjunsky71364712007-12-25 17:00:36 +020082 switch (type) {
Johannes Berg05c914f2008-09-11 00:01:58 +020083 case NL80211_IFTYPE_STATION:
Ron Rindjunsky71364712007-12-25 17:00:36 +020084 return hdr->addr2;
Johannes Berg05c914f2008-09-11 00:01:58 +020085 case NL80211_IFTYPE_AP:
86 case NL80211_IFTYPE_AP_VLAN:
Ron Rindjunsky71364712007-12-25 17:00:36 +020087 return hdr->addr1;
88 default:
Harvey Harrisona494bb12008-06-11 14:21:58 -070089 break; /* fall through to the return */
Ron Rindjunsky71364712007-12-25 17:00:36 +020090 }
91 }
Johannes Bergc2d15602007-07-27 15:43:23 +020092 }
93
94 return NULL;
95}
96
Johannes Berg5cf121c2008-02-25 16:27:43 +010097void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
Johannes Bergc2d15602007-07-27 15:43:23 +020098{
Johannes Berg2de8e0d2009-03-23 17:28:35 +010099 struct sk_buff *skb = tx->skb;
100 struct ieee80211_hdr *hdr;
Johannes Bergc2d15602007-07-27 15:43:23 +0200101
Johannes Berg2de8e0d2009-03-23 17:28:35 +0100102 do {
103 hdr = (struct ieee80211_hdr *) skb->data;
104 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
105 } while ((skb = skb->next));
Johannes Bergc2d15602007-07-27 15:43:23 +0200106}
107
108int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
109 int rate, int erp, int short_preamble)
110{
111 int dur;
112
113 /* calculate duration (in microseconds, rounded up to next higher
114 * integer if it includes a fractional microsecond) to send frame of
115 * len bytes (does not include FCS) at the given rate. Duration will
116 * also include SIFS.
117 *
118 * rate is in 100 kbps, so divident is multiplied by 10 in the
119 * DIV_ROUND_UP() operations.
120 */
121
Johannes Berg8318d782008-01-24 19:38:38 +0100122 if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200123 /*
124 * OFDM:
125 *
126 * N_DBPS = DATARATE x 4
127 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
128 * (16 = SIGNAL time, 6 = tail bits)
129 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
130 *
131 * T_SYM = 4 usec
132 * 802.11a - 17.5.2: aSIFSTime = 16 usec
133 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
134 * signal ext = 6 usec
135 */
Johannes Bergc2d15602007-07-27 15:43:23 +0200136 dur = 16; /* SIFS + signal ext */
137 dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
138 dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
139 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
140 4 * rate); /* T_SYM x N_SYM */
141 } else {
142 /*
143 * 802.11b or 802.11g with 802.11b compatibility:
144 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
145 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
146 *
147 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
148 * aSIFSTime = 10 usec
149 * aPreambleLength = 144 usec or 72 usec with short preamble
150 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
151 */
152 dur = 10; /* aSIFSTime = 10 usec */
153 dur += short_preamble ? (72 + 24) : (144 + 48);
154
155 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
156 }
157
158 return dur;
159}
160
161/* Exported duration function for driver use */
Johannes Berg32bfd352007-12-19 01:31:26 +0100162__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
163 struct ieee80211_vif *vif,
Johannes Berg8318d782008-01-24 19:38:38 +0100164 size_t frame_len,
165 struct ieee80211_rate *rate)
Johannes Bergc2d15602007-07-27 15:43:23 +0200166{
167 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg25d834e2008-09-12 22:52:47 +0200168 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200169 u16 dur;
170 int erp;
Johannes Berg25d834e2008-09-12 22:52:47 +0200171 bool short_preamble = false;
Johannes Bergc2d15602007-07-27 15:43:23 +0200172
Johannes Berg8318d782008-01-24 19:38:38 +0100173 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200174 if (vif) {
175 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200176 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200177 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
178 erp = rate->flags & IEEE80211_RATE_ERP_G;
179 }
Johannes Berg8318d782008-01-24 19:38:38 +0100180
181 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
Johannes Berg25d834e2008-09-12 22:52:47 +0200182 short_preamble);
Johannes Bergc2d15602007-07-27 15:43:23 +0200183
184 return cpu_to_le16(dur);
185}
186EXPORT_SYMBOL(ieee80211_generic_frame_duration);
187
Johannes Berg32bfd352007-12-19 01:31:26 +0100188__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
189 struct ieee80211_vif *vif, size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200190 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200191{
192 struct ieee80211_local *local = hw_to_local(hw);
193 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200194 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100195 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200196 int erp;
197 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200198 struct ieee80211_supported_band *sband;
199
200 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200201
Johannes Berg25d834e2008-09-12 22:52:47 +0200202 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200203
Johannes Berge039fa42008-05-15 12:55:29 +0200204 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100205
206 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200207 if (vif) {
208 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200209 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200210 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
211 erp = rate->flags & IEEE80211_RATE_ERP_G;
212 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200213
214 /* CTS duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100215 dur = ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200216 erp, short_preamble);
217 /* Data frame duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100218 dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200219 erp, short_preamble);
220 /* ACK duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100221 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200222 erp, short_preamble);
223
224 return cpu_to_le16(dur);
225}
226EXPORT_SYMBOL(ieee80211_rts_duration);
227
Johannes Berg32bfd352007-12-19 01:31:26 +0100228__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
229 struct ieee80211_vif *vif,
Johannes Bergc2d15602007-07-27 15:43:23 +0200230 size_t frame_len,
Johannes Berge039fa42008-05-15 12:55:29 +0200231 const struct ieee80211_tx_info *frame_txctl)
Johannes Bergc2d15602007-07-27 15:43:23 +0200232{
233 struct ieee80211_local *local = hw_to_local(hw);
234 struct ieee80211_rate *rate;
Johannes Berg25d834e2008-09-12 22:52:47 +0200235 struct ieee80211_sub_if_data *sdata;
Johannes Berg471b3ef2007-12-28 14:32:58 +0100236 bool short_preamble;
Johannes Bergc2d15602007-07-27 15:43:23 +0200237 int erp;
238 u16 dur;
Johannes Berg2e92e6f2008-05-15 12:55:27 +0200239 struct ieee80211_supported_band *sband;
240
241 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Bergc2d15602007-07-27 15:43:23 +0200242
Johannes Berg25d834e2008-09-12 22:52:47 +0200243 short_preamble = false;
Daniel Drake7e9ed182007-07-27 15:43:24 +0200244
Johannes Berge039fa42008-05-15 12:55:29 +0200245 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
Johannes Berg8318d782008-01-24 19:38:38 +0100246 erp = 0;
Johannes Berg25d834e2008-09-12 22:52:47 +0200247 if (vif) {
248 sdata = vif_to_sdata(vif);
Johannes Bergbda39332008-10-11 01:51:51 +0200249 short_preamble = sdata->vif.bss_conf.use_short_preamble;
Johannes Berg25d834e2008-09-12 22:52:47 +0200250 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
251 erp = rate->flags & IEEE80211_RATE_ERP_G;
252 }
Johannes Bergc2d15602007-07-27 15:43:23 +0200253
254 /* Data frame duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100255 dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200256 erp, short_preamble);
Johannes Berge039fa42008-05-15 12:55:29 +0200257 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
Johannes Bergc2d15602007-07-27 15:43:23 +0200258 /* ACK duration */
Johannes Berg8318d782008-01-24 19:38:38 +0100259 dur += ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Bergc2d15602007-07-27 15:43:23 +0200260 erp, short_preamble);
261 }
262
Johannes Bergc2d15602007-07-27 15:43:23 +0200263 return cpu_to_le16(dur);
264}
265EXPORT_SYMBOL(ieee80211_ctstoself_duration);
266
Kalle Valoce7c9112008-12-18 23:35:20 +0200267static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
268 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200269{
270 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100271 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200272
Johannes Bergb5878a22010-04-07 16:48:40 +0200273 trace_wake_queue(local, queue, reason);
274
Johannes Berge4e72fb2009-03-23 17:28:42 +0100275 if (WARN_ON(queue >= hw->queues))
276 return;
Kalle Valoce7c9112008-12-18 23:35:20 +0200277
Johannes Berg96f5e662009-02-12 00:51:53 +0100278 __clear_bit(reason, &local->queue_stop_reasons[queue]);
279
280 if (local->queue_stop_reasons[queue] != 0)
281 /* someone still has this queue stopped */
282 return;
283
Johannes Berg7236fe22010-03-22 13:42:43 -0700284 if (skb_queue_empty(&local->pending[queue])) {
285 rcu_read_lock();
Johannes Berg5b714c62010-08-27 13:45:28 +0200286 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
287 if (test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
288 continue;
Johannes Berg2337db82010-08-27 13:36:49 +0200289 netif_wake_subqueue(sdata->dev, queue);
Johannes Berg5b714c62010-08-27 13:45:28 +0200290 }
Johannes Berg7236fe22010-03-22 13:42:43 -0700291 rcu_read_unlock();
292 } else
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200293 tasklet_schedule(&local->tx_pending_tasklet);
Johannes Bergc2d15602007-07-27 15:43:23 +0200294}
Kalle Valoce7c9112008-12-18 23:35:20 +0200295
Johannes Berg96f5e662009-02-12 00:51:53 +0100296void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
297 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200298{
299 struct ieee80211_local *local = hw_to_local(hw);
300 unsigned long flags;
301
302 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
303 __ieee80211_wake_queue(hw, queue, reason);
304 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
305}
306
307void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
308{
309 ieee80211_wake_queue_by_reason(hw, queue,
310 IEEE80211_QUEUE_STOP_REASON_DRIVER);
311}
Johannes Bergc2d15602007-07-27 15:43:23 +0200312EXPORT_SYMBOL(ieee80211_wake_queue);
313
Kalle Valoce7c9112008-12-18 23:35:20 +0200314static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
315 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200316{
317 struct ieee80211_local *local = hw_to_local(hw);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100318 struct ieee80211_sub_if_data *sdata;
Johannes Bergc2d15602007-07-27 15:43:23 +0200319
Johannes Bergb5878a22010-04-07 16:48:40 +0200320 trace_stop_queue(local, queue, reason);
321
Johannes Berge4e72fb2009-03-23 17:28:42 +0100322 if (WARN_ON(queue >= hw->queues))
323 return;
Johannes Berg96f5e662009-02-12 00:51:53 +0100324
Johannes Berg2a577d92009-03-23 17:28:37 +0100325 __set_bit(reason, &local->queue_stop_reasons[queue]);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100326
327 rcu_read_lock();
328 list_for_each_entry_rcu(sdata, &local->interfaces, list)
Johannes Berg2337db82010-08-27 13:36:49 +0200329 netif_stop_subqueue(sdata->dev, queue);
Johannes Bergcf0277e2010-01-05 18:00:58 +0100330 rcu_read_unlock();
Johannes Bergc2d15602007-07-27 15:43:23 +0200331}
Kalle Valoce7c9112008-12-18 23:35:20 +0200332
Johannes Berg96f5e662009-02-12 00:51:53 +0100333void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
334 enum queue_stop_reason reason)
Kalle Valoce7c9112008-12-18 23:35:20 +0200335{
336 struct ieee80211_local *local = hw_to_local(hw);
337 unsigned long flags;
338
339 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
340 __ieee80211_stop_queue(hw, queue, reason);
341 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
342}
343
344void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
345{
346 ieee80211_stop_queue_by_reason(hw, queue,
347 IEEE80211_QUEUE_STOP_REASON_DRIVER);
348}
Johannes Bergc2d15602007-07-27 15:43:23 +0200349EXPORT_SYMBOL(ieee80211_stop_queue);
350
Johannes Berg8f77f382009-06-07 21:58:37 +0200351void ieee80211_add_pending_skb(struct ieee80211_local *local,
352 struct sk_buff *skb)
353{
354 struct ieee80211_hw *hw = &local->hw;
355 unsigned long flags;
356 int queue = skb_get_queue_mapping(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200357 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
358
359 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200360 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200361 return;
362 }
Johannes Berg8f77f382009-06-07 21:58:37 +0200363
364 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
365 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200366 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200367 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
368 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
369}
370
371int ieee80211_add_pending_skbs(struct ieee80211_local *local,
372 struct sk_buff_head *skbs)
373{
374 struct ieee80211_hw *hw = &local->hw;
375 struct sk_buff *skb;
376 unsigned long flags;
377 int queue, ret = 0, i;
378
379 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
380 for (i = 0; i < hw->queues; i++)
381 __ieee80211_stop_queue(hw, i,
382 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
383
384 while ((skb = skb_dequeue(skbs))) {
Johannes Berga7bc3762009-07-27 10:33:31 +0200385 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
386
387 if (WARN_ON(!info->control.vif)) {
Roel Kluin08196632009-10-06 15:52:35 +0200388 kfree_skb(skb);
Johannes Berga7bc3762009-07-27 10:33:31 +0200389 continue;
390 }
391
Johannes Berg8f77f382009-06-07 21:58:37 +0200392 ret++;
393 queue = skb_get_queue_mapping(skb);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200394 __skb_queue_tail(&local->pending[queue], skb);
Johannes Berg8f77f382009-06-07 21:58:37 +0200395 }
396
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200397 for (i = 0; i < hw->queues; i++)
Johannes Berg8f77f382009-06-07 21:58:37 +0200398 __ieee80211_wake_queue(hw, i,
399 IEEE80211_QUEUE_STOP_REASON_SKB_ADD);
Johannes Berg8f77f382009-06-07 21:58:37 +0200400 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
401
402 return ret;
403}
404
Kalle Valoce7c9112008-12-18 23:35:20 +0200405void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
406 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200407{
Kalle Valoce7c9112008-12-18 23:35:20 +0200408 struct ieee80211_local *local = hw_to_local(hw);
409 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200410 int i;
411
Kalle Valoce7c9112008-12-18 23:35:20 +0200412 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
413
Johannes Berg96f5e662009-02-12 00:51:53 +0100414 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200415 __ieee80211_stop_queue(hw, i, reason);
416
417 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
418}
419
420void ieee80211_stop_queues(struct ieee80211_hw *hw)
421{
422 ieee80211_stop_queues_by_reason(hw,
423 IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200424}
425EXPORT_SYMBOL(ieee80211_stop_queues);
426
Tomas Winkler92ab8532008-07-24 21:02:04 +0300427int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
428{
429 struct ieee80211_local *local = hw_to_local(hw);
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200430 unsigned long flags;
431 int ret;
Johannes Berg96f5e662009-02-12 00:51:53 +0100432
Johannes Berge4e72fb2009-03-23 17:28:42 +0100433 if (WARN_ON(queue >= hw->queues))
434 return true;
Johannes Berg96f5e662009-02-12 00:51:53 +0100435
Johannes Berg3b8d81e02009-06-17 17:43:56 +0200436 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
437 ret = !!local->queue_stop_reasons[queue];
438 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
439 return ret;
Tomas Winkler92ab8532008-07-24 21:02:04 +0300440}
441EXPORT_SYMBOL(ieee80211_queue_stopped);
442
Kalle Valoce7c9112008-12-18 23:35:20 +0200443void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
444 enum queue_stop_reason reason)
Johannes Bergc2d15602007-07-27 15:43:23 +0200445{
Kalle Valoce7c9112008-12-18 23:35:20 +0200446 struct ieee80211_local *local = hw_to_local(hw);
447 unsigned long flags;
Johannes Bergc2d15602007-07-27 15:43:23 +0200448 int i;
449
Kalle Valoce7c9112008-12-18 23:35:20 +0200450 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
451
Johannes Berge4e72fb2009-03-23 17:28:42 +0100452 for (i = 0; i < hw->queues; i++)
Kalle Valoce7c9112008-12-18 23:35:20 +0200453 __ieee80211_wake_queue(hw, i, reason);
454
455 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
456}
457
458void ieee80211_wake_queues(struct ieee80211_hw *hw)
459{
460 ieee80211_wake_queues_by_reason(hw, IEEE80211_QUEUE_STOP_REASON_DRIVER);
Johannes Bergc2d15602007-07-27 15:43:23 +0200461}
462EXPORT_SYMBOL(ieee80211_wake_queues);
Johannes Bergdabeb342007-11-09 01:57:29 +0100463
Johannes Berg32bfd352007-12-19 01:31:26 +0100464void ieee80211_iterate_active_interfaces(
465 struct ieee80211_hw *hw,
466 void (*iterator)(void *data, u8 *mac,
467 struct ieee80211_vif *vif),
468 void *data)
Johannes Bergdabeb342007-11-09 01:57:29 +0100469{
470 struct ieee80211_local *local = hw_to_local(hw);
471 struct ieee80211_sub_if_data *sdata;
472
Johannes Bergc771c9d2009-01-23 22:54:03 +0100473 mutex_lock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200474
475 list_for_each_entry(sdata, &local->interfaces, list) {
476 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200477 case NL80211_IFTYPE_MONITOR:
478 case NL80211_IFTYPE_AP_VLAN:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200479 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200480 default:
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200481 break;
482 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100483 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100484 iterator(data, sdata->vif.addr,
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200485 &sdata->vif);
486 }
487
Johannes Bergc771c9d2009-01-23 22:54:03 +0100488 mutex_unlock(&local->iflist_mtx);
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200489}
490EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
491
492void ieee80211_iterate_active_interfaces_atomic(
493 struct ieee80211_hw *hw,
494 void (*iterator)(void *data, u8 *mac,
495 struct ieee80211_vif *vif),
496 void *data)
497{
498 struct ieee80211_local *local = hw_to_local(hw);
499 struct ieee80211_sub_if_data *sdata;
500
Johannes Berge38bad42007-11-28 10:55:32 +0100501 rcu_read_lock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100502
Johannes Berge38bad42007-11-28 10:55:32 +0100503 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
Johannes Berg51fb61e2007-12-19 01:31:27 +0100504 switch (sdata->vif.type) {
Johannes Berg05c914f2008-09-11 00:01:58 +0200505 case NL80211_IFTYPE_MONITOR:
506 case NL80211_IFTYPE_AP_VLAN:
Johannes Bergdabeb342007-11-09 01:57:29 +0100507 continue;
Johannes Berg2ca27bc2010-09-16 14:58:23 +0200508 default:
Johannes Bergdabeb342007-11-09 01:57:29 +0100509 break;
510 }
Johannes Berg9607e6b2009-12-23 13:15:31 +0100511 if (ieee80211_sdata_running(sdata))
Johannes Berg47846c92009-11-25 17:46:19 +0100512 iterator(data, sdata->vif.addr,
Johannes Berg32bfd352007-12-19 01:31:26 +0100513 &sdata->vif);
Johannes Bergdabeb342007-11-09 01:57:29 +0100514 }
Johannes Berge38bad42007-11-28 10:55:32 +0100515
516 rcu_read_unlock();
Johannes Bergdabeb342007-11-09 01:57:29 +0100517}
Ivo van Doorn2f561fe2008-05-10 13:40:49 +0200518EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200519
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400520/*
521 * Nothing should have been stuffed into the workqueue during
522 * the suspend->resume cycle. If this WARN is seen then there
523 * is a bug with either the driver suspend or something in
524 * mac80211 stuffing into the workqueue which we haven't yet
525 * cleared during mac80211's suspend cycle.
526 */
527static bool ieee80211_can_queue_work(struct ieee80211_local *local)
528{
Johannes Bergceb99fe2009-11-19 14:29:39 +0100529 if (WARN(local->suspended && !local->resuming,
530 "queueing ieee80211 work while going to suspend\n"))
531 return false;
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -0400532
533 return true;
534}
535
536void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
537{
538 struct ieee80211_local *local = hw_to_local(hw);
539
540 if (!ieee80211_can_queue_work(local))
541 return;
542
543 queue_work(local->workqueue, work);
544}
545EXPORT_SYMBOL(ieee80211_queue_work);
546
547void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
548 struct delayed_work *dwork,
549 unsigned long delay)
550{
551 struct ieee80211_local *local = hw_to_local(hw);
552
553 if (!ieee80211_can_queue_work(local))
554 return;
555
556 queue_delayed_work(local->workqueue, dwork, delay);
557}
558EXPORT_SYMBOL(ieee80211_queue_delayed_work);
559
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200560void ieee802_11_parse_elems(u8 *start, size_t len,
561 struct ieee802_11_elems *elems)
562{
Johannes Bergd91f36d2009-04-16 13:17:26 +0200563 ieee802_11_parse_elems_crc(start, len, elems, 0, 0);
564}
565
566u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
567 struct ieee802_11_elems *elems,
568 u64 filter, u32 crc)
569{
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200570 size_t left = len;
571 u8 *pos = start;
Johannes Bergd91f36d2009-04-16 13:17:26 +0200572 bool calc_crc = filter != 0;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200573
574 memset(elems, 0, sizeof(*elems));
575 elems->ie_start = start;
576 elems->total_len = len;
577
578 while (left >= 2) {
579 u8 id, elen;
580
581 id = *pos++;
582 elen = *pos++;
583 left -= 2;
584
585 if (elen > left)
Johannes Bergd91f36d2009-04-16 13:17:26 +0200586 break;
587
Vasanthakumar Thiagarajan18140772009-12-04 17:41:34 +0530588 if (calc_crc && id < 64 && (filter & (1ULL << id)))
Johannes Bergd91f36d2009-04-16 13:17:26 +0200589 crc = crc32_be(crc, pos - 2, elen + 2);
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200590
591 switch (id) {
592 case WLAN_EID_SSID:
593 elems->ssid = pos;
594 elems->ssid_len = elen;
595 break;
596 case WLAN_EID_SUPP_RATES:
597 elems->supp_rates = pos;
598 elems->supp_rates_len = elen;
599 break;
600 case WLAN_EID_FH_PARAMS:
601 elems->fh_params = pos;
602 elems->fh_params_len = elen;
603 break;
604 case WLAN_EID_DS_PARAMS:
605 elems->ds_params = pos;
606 elems->ds_params_len = elen;
607 break;
608 case WLAN_EID_CF_PARAMS:
609 elems->cf_params = pos;
610 elems->cf_params_len = elen;
611 break;
612 case WLAN_EID_TIM:
Johannes Berge7ec86f2009-04-18 17:33:24 +0200613 if (elen >= sizeof(struct ieee80211_tim_ie)) {
614 elems->tim = (void *)pos;
615 elems->tim_len = elen;
616 }
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200617 break;
618 case WLAN_EID_IBSS_PARAMS:
619 elems->ibss_params = pos;
620 elems->ibss_params_len = elen;
621 break;
622 case WLAN_EID_CHALLENGE:
623 elems->challenge = pos;
624 elems->challenge_len = elen;
625 break;
Johannes Bergd91f36d2009-04-16 13:17:26 +0200626 case WLAN_EID_VENDOR_SPECIFIC:
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200627 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
628 pos[2] == 0xf2) {
629 /* Microsoft OUI (00:50:F2) */
Johannes Bergd91f36d2009-04-16 13:17:26 +0200630
631 if (calc_crc)
632 crc = crc32_be(crc, pos - 2, elen + 2);
633
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200634 if (pos[3] == 1) {
635 /* OUI Type 1 - WPA IE */
636 elems->wpa = pos;
637 elems->wpa_len = elen;
638 } else if (elen >= 5 && pos[3] == 2) {
Johannes Bergd91f36d2009-04-16 13:17:26 +0200639 /* OUI Type 2 - WMM IE */
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200640 if (pos[4] == 0) {
641 elems->wmm_info = pos;
642 elems->wmm_info_len = elen;
643 } else if (pos[4] == 1) {
644 elems->wmm_param = pos;
645 elems->wmm_param_len = elen;
646 }
647 }
648 }
649 break;
650 case WLAN_EID_RSN:
651 elems->rsn = pos;
652 elems->rsn_len = elen;
653 break;
654 case WLAN_EID_ERP_INFO:
655 elems->erp_info = pos;
656 elems->erp_info_len = elen;
657 break;
658 case WLAN_EID_EXT_SUPP_RATES:
659 elems->ext_supp_rates = pos;
660 elems->ext_supp_rates_len = elen;
661 break;
662 case WLAN_EID_HT_CAPABILITY:
Johannes Berg09914812008-10-07 19:31:17 +0200663 if (elen >= sizeof(struct ieee80211_ht_cap))
664 elems->ht_cap_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200665 break;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200666 case WLAN_EID_HT_INFORMATION:
667 if (elen >= sizeof(struct ieee80211_ht_info))
Johannes Berg09914812008-10-07 19:31:17 +0200668 elems->ht_info_elem = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200669 break;
670 case WLAN_EID_MESH_ID:
671 elems->mesh_id = pos;
672 elems->mesh_id_len = elen;
673 break;
674 case WLAN_EID_MESH_CONFIG:
Rui Paulo136cfa22009-11-18 18:40:00 +0000675 if (elen >= sizeof(struct ieee80211_meshconf_ie))
676 elems->mesh_config = (void *)pos;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200677 break;
678 case WLAN_EID_PEER_LINK:
679 elems->peer_link = pos;
680 elems->peer_link_len = elen;
681 break;
682 case WLAN_EID_PREQ:
683 elems->preq = pos;
684 elems->preq_len = elen;
685 break;
686 case WLAN_EID_PREP:
687 elems->prep = pos;
688 elems->prep_len = elen;
689 break;
690 case WLAN_EID_PERR:
691 elems->perr = pos;
692 elems->perr_len = elen;
693 break;
Rui Paulo90a5e162009-11-11 00:01:31 +0000694 case WLAN_EID_RANN:
695 if (elen >= sizeof(struct ieee80211_rann_ie))
696 elems->rann = (void *)pos;
697 break;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200698 case WLAN_EID_CHANNEL_SWITCH:
699 elems->ch_switch_elem = pos;
700 elems->ch_switch_elem_len = elen;
701 break;
702 case WLAN_EID_QUIET:
703 if (!elems->quiet_elem) {
704 elems->quiet_elem = pos;
705 elems->quiet_elem_len = elen;
706 }
707 elems->num_of_quiet_elem++;
708 break;
709 case WLAN_EID_COUNTRY:
710 elems->country_elem = pos;
711 elems->country_elem_len = elen;
712 break;
713 case WLAN_EID_PWR_CONSTRAINT:
714 elems->pwr_constr_elem = pos;
715 elems->pwr_constr_elem_len = elen;
716 break;
Jouni Malinenf797eb72009-01-19 18:48:46 +0200717 case WLAN_EID_TIMEOUT_INTERVAL:
718 elems->timeout_int = pos;
719 elems->timeout_int_len = elen;
Jouni Malinen63a5ab82009-01-08 13:32:09 +0200720 break;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200721 default:
722 break;
723 }
724
725 left -= elen;
726 pos += elen;
727 }
Johannes Bergd91f36d2009-04-16 13:17:26 +0200728
729 return crc;
Johannes Berg37ffc8d2008-09-08 16:40:36 +0200730}
Johannes Berg5825fe12008-09-09 12:56:01 +0200731
732void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
733{
734 struct ieee80211_local *local = sdata->local;
735 struct ieee80211_tx_queue_params qparam;
Johannes Bergaa837e12009-05-07 16:16:24 +0200736 int queue;
737 bool use_11b;
738 int aCWmin, aCWmax;
Johannes Berg5825fe12008-09-09 12:56:01 +0200739
740 if (!local->ops->conf_tx)
741 return;
742
743 memset(&qparam, 0, sizeof(qparam));
744
Johannes Bergaa837e12009-05-07 16:16:24 +0200745 use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
746 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
Johannes Berg5825fe12008-09-09 12:56:01 +0200747
Johannes Bergaa837e12009-05-07 16:16:24 +0200748 for (queue = 0; queue < local_to_hw(local)->queues; queue++) {
749 /* Set defaults according to 802.11-2007 Table 7-37 */
750 aCWmax = 1023;
751 if (use_11b)
752 aCWmin = 31;
753 else
754 aCWmin = 15;
Johannes Berg5825fe12008-09-09 12:56:01 +0200755
Johannes Bergaa837e12009-05-07 16:16:24 +0200756 switch (queue) {
757 case 3: /* AC_BK */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200758 qparam.cw_max = aCWmax;
759 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200760 qparam.txop = 0;
761 qparam.aifs = 7;
762 break;
763 default: /* never happens but let's not leave undefined */
764 case 2: /* AC_BE */
Johannes Berg7ba10a82009-05-27 09:41:06 +0200765 qparam.cw_max = aCWmax;
766 qparam.cw_min = aCWmin;
Johannes Bergaa837e12009-05-07 16:16:24 +0200767 qparam.txop = 0;
768 qparam.aifs = 3;
769 break;
770 case 1: /* AC_VI */
771 qparam.cw_max = aCWmin;
772 qparam.cw_min = (aCWmin + 1) / 2 - 1;
773 if (use_11b)
774 qparam.txop = 6016/32;
775 else
776 qparam.txop = 3008/32;
777 qparam.aifs = 2;
778 break;
779 case 0: /* AC_VO */
780 qparam.cw_max = (aCWmin + 1) / 2 - 1;
781 qparam.cw_min = (aCWmin + 1) / 4 - 1;
782 if (use_11b)
783 qparam.txop = 3264/32;
784 else
785 qparam.txop = 1504/32;
786 qparam.aifs = 2;
787 break;
788 }
Johannes Berg5825fe12008-09-09 12:56:01 +0200789
Kalle Valoab133152010-01-12 10:42:31 +0200790 qparam.uapsd = false;
791
Johannes Bergaa837e12009-05-07 16:16:24 +0200792 drv_conf_tx(local, queue, &qparam);
793 }
Stanislaw Gruszkae1b3ec12010-03-29 12:18:34 +0200794
795 /* after reinitialize QoS TX queues setting to default,
796 * disable QoS at all */
Sujithd9734972010-07-23 10:47:11 +0530797
798 if (sdata->vif.type != NL80211_IFTYPE_MONITOR) {
799 sdata->vif.bss_conf.qos =
800 sdata->vif.type != NL80211_IFTYPE_STATION;
801 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
802 }
Johannes Berg5825fe12008-09-09 12:56:01 +0200803}
Johannes Berge50db652008-09-09 15:07:09 +0200804
Johannes Berg46900292009-02-15 12:44:28 +0100805void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
806 const size_t supp_rates_len,
807 const u8 *supp_rates)
808{
809 struct ieee80211_local *local = sdata->local;
810 int i, have_higher_than_11mbit = 0;
811
812 /* cf. IEEE 802.11 9.2.12 */
813 for (i = 0; i < supp_rates_len; i++)
814 if ((supp_rates[i] & 0x7f) * 5 > 110)
815 have_higher_than_11mbit = 1;
816
817 if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
818 have_higher_than_11mbit)
819 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
820 else
821 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
822
823 ieee80211_set_wmm_default(sdata);
824}
825
Johannes Berg881d9482009-01-21 15:13:48 +0100826u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
Johannes Berg96dd22a2008-09-11 00:01:57 +0200827 enum ieee80211_band band)
828{
829 struct ieee80211_supported_band *sband;
830 struct ieee80211_rate *bitrates;
Johannes Berg881d9482009-01-21 15:13:48 +0100831 u32 mandatory_rates;
Johannes Berg96dd22a2008-09-11 00:01:57 +0200832 enum ieee80211_rate_flags mandatory_flag;
833 int i;
834
835 sband = local->hw.wiphy->bands[band];
836 if (!sband) {
837 WARN_ON(1);
838 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
839 }
840
841 if (band == IEEE80211_BAND_2GHZ)
842 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
843 else
844 mandatory_flag = IEEE80211_RATE_MANDATORY_A;
845
846 bitrates = sband->bitrates;
847 mandatory_rates = 0;
848 for (i = 0; i < sband->n_bitrates; i++)
849 if (bitrates[i].flags & mandatory_flag)
850 mandatory_rates |= BIT(i);
851 return mandatory_rates;
852}
Johannes Berg46900292009-02-15 12:44:28 +0100853
854void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
855 u16 transaction, u16 auth_alg,
Johannes Bergfffd0932009-07-08 14:22:54 +0200856 u8 *extra, size_t extra_len, const u8 *bssid,
857 const u8 *key, u8 key_len, u8 key_idx)
Johannes Berg46900292009-02-15 12:44:28 +0100858{
859 struct ieee80211_local *local = sdata->local;
860 struct sk_buff *skb;
861 struct ieee80211_mgmt *mgmt;
Johannes Bergfffd0932009-07-08 14:22:54 +0200862 int err;
Johannes Berg46900292009-02-15 12:44:28 +0100863
864 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
Jouni Malinen65fc73a2009-03-20 21:21:16 +0200865 sizeof(*mgmt) + 6 + extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100866 if (!skb) {
867 printk(KERN_DEBUG "%s: failed to allocate buffer for auth "
Johannes Berg47846c92009-11-25 17:46:19 +0100868 "frame\n", sdata->name);
Johannes Berg46900292009-02-15 12:44:28 +0100869 return;
870 }
871 skb_reserve(skb, local->hw.extra_tx_headroom);
872
873 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
874 memset(mgmt, 0, 24 + 6);
875 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
876 IEEE80211_STYPE_AUTH);
Johannes Berg46900292009-02-15 12:44:28 +0100877 memcpy(mgmt->da, bssid, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100878 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100879 memcpy(mgmt->bssid, bssid, ETH_ALEN);
880 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
881 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
882 mgmt->u.auth.status_code = cpu_to_le16(0);
883 if (extra)
884 memcpy(skb_put(skb, extra_len), extra, extra_len);
Johannes Berg46900292009-02-15 12:44:28 +0100885
Johannes Bergfffd0932009-07-08 14:22:54 +0200886 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
887 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
888 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
889 WARN_ON(err);
890 }
891
Johannes Berg62ae67b2009-11-18 18:42:05 +0100892 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
893 ieee80211_tx_skb(sdata, skb);
Johannes Berg46900292009-02-15 12:44:28 +0100894}
895
Johannes Bergde95a542009-04-01 11:58:36 +0200896int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
Johannes Berg4d36ec52009-10-27 20:59:55 +0100897 const u8 *ie, size_t ie_len,
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300898 enum ieee80211_band band, u32 rate_mask)
Johannes Bergde95a542009-04-01 11:58:36 +0200899{
900 struct ieee80211_supported_band *sband;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100901 u8 *pos;
902 size_t offset = 0, noffset;
903 int supp_rates_len, i;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300904 u8 rates[32];
905 int num_rates;
906 int ext_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +0200907
Johannes Berg4d36ec52009-10-27 20:59:55 +0100908 sband = local->hw.wiphy->bands[band];
Johannes Bergde95a542009-04-01 11:58:36 +0200909
910 pos = buffer;
911
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300912 num_rates = 0;
913 for (i = 0; i < sband->n_bitrates; i++) {
914 if ((BIT(i) & rate_mask) == 0)
915 continue; /* skip rate */
916 rates[num_rates++] = (u8) (sband->bitrates[i].bitrate / 5);
917 }
918
919 supp_rates_len = min_t(int, num_rates, 8);
Johannes Berg8e664fb2009-12-23 13:15:38 +0100920
Johannes Bergde95a542009-04-01 11:58:36 +0200921 *pos++ = WLAN_EID_SUPP_RATES;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100922 *pos++ = supp_rates_len;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300923 memcpy(pos, rates, supp_rates_len);
924 pos += supp_rates_len;
Johannes Bergde95a542009-04-01 11:58:36 +0200925
Johannes Berg8e664fb2009-12-23 13:15:38 +0100926 /* insert "request information" if in custom IEs */
927 if (ie && ie_len) {
928 static const u8 before_extrates[] = {
929 WLAN_EID_SSID,
930 WLAN_EID_SUPP_RATES,
931 WLAN_EID_REQUEST,
932 };
933 noffset = ieee80211_ie_split(ie, ie_len,
934 before_extrates,
935 ARRAY_SIZE(before_extrates),
936 offset);
937 memcpy(pos, ie + offset, noffset - offset);
938 pos += noffset - offset;
939 offset = noffset;
940 }
Johannes Bergde95a542009-04-01 11:58:36 +0200941
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300942 ext_rates_len = num_rates - supp_rates_len;
943 if (ext_rates_len > 0) {
Johannes Berg8e664fb2009-12-23 13:15:38 +0100944 *pos++ = WLAN_EID_EXT_SUPP_RATES;
Jouni Malinen8dcb2002010-08-28 19:36:10 +0300945 *pos++ = ext_rates_len;
946 memcpy(pos, rates + supp_rates_len, ext_rates_len);
947 pos += ext_rates_len;
Johannes Berg8e664fb2009-12-23 13:15:38 +0100948 }
949
950 /* insert custom IEs that go before HT */
951 if (ie && ie_len) {
952 static const u8 before_ht[] = {
953 WLAN_EID_SSID,
954 WLAN_EID_SUPP_RATES,
955 WLAN_EID_REQUEST,
956 WLAN_EID_EXT_SUPP_RATES,
957 WLAN_EID_DS_PARAMS,
958 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
959 };
960 noffset = ieee80211_ie_split(ie, ie_len,
961 before_ht, ARRAY_SIZE(before_ht),
962 offset);
963 memcpy(pos, ie + offset, noffset - offset);
964 pos += noffset - offset;
965 offset = noffset;
Johannes Bergde95a542009-04-01 11:58:36 +0200966 }
967
Johannes Berg5ef2d412009-03-31 12:12:07 +0200968 if (sband->ht_cap.ht_supported) {
Johannes Bergf38fd122009-12-01 18:29:42 +0100969 u16 cap = sband->ht_cap.cap;
970 __le16 tmp;
971
972 if (ieee80211_disable_40mhz_24ghz &&
973 sband->band == IEEE80211_BAND_2GHZ) {
974 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
975 cap &= ~IEEE80211_HT_CAP_SGI_40;
976 }
Johannes Berg5ef2d412009-03-31 12:12:07 +0200977
978 *pos++ = WLAN_EID_HT_CAPABILITY;
979 *pos++ = sizeof(struct ieee80211_ht_cap);
980 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
Johannes Bergf38fd122009-12-01 18:29:42 +0100981 tmp = cpu_to_le16(cap);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200982 memcpy(pos, &tmp, sizeof(u16));
983 pos += sizeof(u16);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200984 *pos++ = sband->ht_cap.ampdu_factor |
Johannes Bergf38fd122009-12-01 18:29:42 +0100985 (sband->ht_cap.ampdu_density <<
986 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
Johannes Berg5ef2d412009-03-31 12:12:07 +0200987 memcpy(pos, &sband->ht_cap.mcs, sizeof(sband->ht_cap.mcs));
988 pos += sizeof(sband->ht_cap.mcs);
989 pos += 2 + 4 + 1; /* ext info, BF cap, antsel */
990 }
991
Johannes Bergde95a542009-04-01 11:58:36 +0200992 /*
993 * If adding more here, adjust code in main.c
994 * that calculates local->scan_ies_len.
995 */
996
Johannes Berg8e664fb2009-12-23 13:15:38 +0100997 /* add any remaining custom IEs */
998 if (ie && ie_len) {
999 noffset = ie_len;
1000 memcpy(pos, ie + offset, noffset - offset);
1001 pos += noffset - offset;
Johannes Bergde95a542009-04-01 11:58:36 +02001002 }
1003
1004 return pos - buffer;
1005}
1006
Johannes Berg46900292009-02-15 12:44:28 +01001007void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
Johannes Bergde95a542009-04-01 11:58:36 +02001008 const u8 *ssid, size_t ssid_len,
1009 const u8 *ie, size_t ie_len)
Johannes Berg46900292009-02-15 12:44:28 +01001010{
1011 struct ieee80211_local *local = sdata->local;
Johannes Berg46900292009-02-15 12:44:28 +01001012 struct sk_buff *skb;
1013 struct ieee80211_mgmt *mgmt;
Kalle Valo7c12ce82010-01-05 20:16:44 +02001014 size_t buf_len;
1015 u8 *buf;
Johannes Berg46900292009-02-15 12:44:28 +01001016
Kalle Valo7c12ce82010-01-05 20:16:44 +02001017 /* FIXME: come up with a proper value */
1018 buf = kmalloc(200 + ie_len, GFP_KERNEL);
1019 if (!buf) {
1020 printk(KERN_DEBUG "%s: failed to allocate temporary IE "
1021 "buffer\n", sdata->name);
Johannes Berg46900292009-02-15 12:44:28 +01001022 return;
1023 }
Johannes Berg46900292009-02-15 12:44:28 +01001024
Kalle Valo7c12ce82010-01-05 20:16:44 +02001025 buf_len = ieee80211_build_preq_ies(local, buf, ie, ie_len,
Jouni Malinen8dcb2002010-08-28 19:36:10 +03001026 local->hw.conf.channel->band,
1027 sdata->rc_rateidx_mask
1028 [local->hw.conf.channel->band]);
Kalle Valo7c12ce82010-01-05 20:16:44 +02001029
1030 skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1031 ssid, ssid_len,
1032 buf, buf_len);
1033
Johannes Berg46900292009-02-15 12:44:28 +01001034 if (dst) {
Kalle Valo7c12ce82010-01-05 20:16:44 +02001035 mgmt = (struct ieee80211_mgmt *) skb->data;
Johannes Berg46900292009-02-15 12:44:28 +01001036 memcpy(mgmt->da, dst, ETH_ALEN);
1037 memcpy(mgmt->bssid, dst, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +01001038 }
Johannes Berg46900292009-02-15 12:44:28 +01001039
Johannes Berg62ae67b2009-11-18 18:42:05 +01001040 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1041 ieee80211_tx_skb(sdata, skb);
Ming Lei145b6d12010-01-15 21:44:21 +08001042 kfree(buf);
Johannes Berg46900292009-02-15 12:44:28 +01001043}
1044
1045u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
1046 struct ieee802_11_elems *elems,
1047 enum ieee80211_band band)
1048{
1049 struct ieee80211_supported_band *sband;
1050 struct ieee80211_rate *bitrates;
1051 size_t num_rates;
1052 u32 supp_rates;
1053 int i, j;
1054 sband = local->hw.wiphy->bands[band];
1055
1056 if (!sband) {
1057 WARN_ON(1);
1058 sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
1059 }
1060
1061 bitrates = sband->bitrates;
1062 num_rates = sband->n_bitrates;
1063 supp_rates = 0;
1064 for (i = 0; i < elems->supp_rates_len +
1065 elems->ext_supp_rates_len; i++) {
1066 u8 rate = 0;
1067 int own_rate;
1068 if (i < elems->supp_rates_len)
1069 rate = elems->supp_rates[i];
1070 else if (elems->ext_supp_rates)
1071 rate = elems->ext_supp_rates
1072 [i - elems->supp_rates_len];
1073 own_rate = 5 * (rate & 0x7f);
1074 for (j = 0; j < num_rates; j++)
1075 if (bitrates[j].bitrate == own_rate)
1076 supp_rates |= BIT(j);
1077 }
1078 return supp_rates;
1079}
Johannes Bergf2753dd2009-04-14 10:09:24 +02001080
Johannes Berg84f6a012009-08-20 20:02:20 +02001081void ieee80211_stop_device(struct ieee80211_local *local)
1082{
1083 ieee80211_led_radio(local, false);
1084
1085 cancel_work_sync(&local->reconfig_filter);
Johannes Berg84f6a012009-08-20 20:02:20 +02001086
1087 flush_workqueue(local->workqueue);
Lennert Buytenhek678f4152010-01-10 14:07:53 +01001088 drv_stop(local);
Johannes Berg84f6a012009-08-20 20:02:20 +02001089}
1090
Johannes Bergf2753dd2009-04-14 10:09:24 +02001091int ieee80211_reconfig(struct ieee80211_local *local)
1092{
1093 struct ieee80211_hw *hw = &local->hw;
1094 struct ieee80211_sub_if_data *sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001095 struct sta_info *sta;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001096 int res;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001097
Johannes Bergceb99fe2009-11-19 14:29:39 +01001098 if (local->suspended)
1099 local->resuming = true;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001100
1101 /* restart hardware */
1102 if (local->open_count) {
Luis R. Rodriguez24feda02009-12-24 15:38:22 -05001103 /*
1104 * Upon resume hardware can sometimes be goofy due to
1105 * various platform / driver / bus issues, so restarting
1106 * the device may at times not work immediately. Propagate
1107 * the error.
1108 */
Johannes Berg24487982009-04-23 18:52:52 +02001109 res = drv_start(local);
Luis R. Rodriguez24feda02009-12-24 15:38:22 -05001110 if (res) {
John W. Linvillec7a00dc2010-03-17 11:28:18 -04001111 WARN(local->suspended, "Hardware became unavailable "
1112 "upon resume. This could be a software issue "
1113 "prior to suspend or a hardware issue.\n");
Luis R. Rodriguez24feda02009-12-24 15:38:22 -05001114 return res;
1115 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001116
Johannes Berg1f87f7d2009-06-02 13:01:41 +02001117 ieee80211_led_radio(local, true);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001118 }
1119
1120 /* add interfaces */
1121 list_for_each_entry(sdata, &local->interfaces, list) {
1122 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1123 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
Johannes Berg1ed32e42009-12-23 13:15:45 +01001124 ieee80211_sdata_running(sdata))
1125 res = drv_add_interface(local, &sdata->vif);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001126 }
1127
1128 /* add STAs back */
Johannes Berg34e89502010-02-03 13:59:58 +01001129 mutex_lock(&local->sta_mtx);
1130 list_for_each_entry(sta, &local->sta_list, list) {
1131 if (sta->uploaded) {
Johannes Berg5bb644a2009-05-17 11:40:42 +02001132 sdata = sta->sdata;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001133 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1134 sdata = container_of(sdata->bss,
1135 struct ieee80211_sub_if_data,
1136 u.ap);
1137
Johannes Berg34e89502010-02-03 13:59:58 +01001138 WARN_ON(drv_sta_add(local, sdata, &sta->sta));
Johannes Bergf2753dd2009-04-14 10:09:24 +02001139 }
Johannes Bergf2753dd2009-04-14 10:09:24 +02001140 }
Johannes Berg34e89502010-02-03 13:59:58 +01001141 mutex_unlock(&local->sta_mtx);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001142
Johannes Bergf2753dd2009-04-14 10:09:24 +02001143 /* setup RTS threshold */
Johannes Berg24487982009-04-23 18:52:52 +02001144 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001145
1146 /* reconfigure hardware */
1147 ieee80211_hw_config(local, ~0);
1148
Johannes Bergf2753dd2009-04-14 10:09:24 +02001149 ieee80211_configure_filter(local);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001150
1151 /* Finally also reconfigure all the BSS information */
1152 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Bergac8dd502010-05-05 09:44:02 +02001153 u32 changed;
1154
Johannes Berg9607e6b2009-12-23 13:15:31 +01001155 if (!ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001156 continue;
Johannes Bergac8dd502010-05-05 09:44:02 +02001157
1158 /* common change flags for all interface types */
1159 changed = BSS_CHANGED_ERP_CTS_PROT |
1160 BSS_CHANGED_ERP_PREAMBLE |
1161 BSS_CHANGED_ERP_SLOT |
1162 BSS_CHANGED_HT |
1163 BSS_CHANGED_BASIC_RATES |
1164 BSS_CHANGED_BEACON_INT |
1165 BSS_CHANGED_BSSID |
Johannes Berg4ced3f72010-07-19 16:39:04 +02001166 BSS_CHANGED_CQM |
1167 BSS_CHANGED_QOS;
Johannes Bergac8dd502010-05-05 09:44:02 +02001168
Johannes Bergf2753dd2009-04-14 10:09:24 +02001169 switch (sdata->vif.type) {
1170 case NL80211_IFTYPE_STATION:
Johannes Bergac8dd502010-05-05 09:44:02 +02001171 changed |= BSS_CHANGED_ASSOC;
1172 ieee80211_bss_info_change_notify(sdata, changed);
1173 break;
Johannes Bergf2753dd2009-04-14 10:09:24 +02001174 case NL80211_IFTYPE_ADHOC:
Johannes Bergac8dd502010-05-05 09:44:02 +02001175 changed |= BSS_CHANGED_IBSS;
1176 /* fall through */
Johannes Bergf2753dd2009-04-14 10:09:24 +02001177 case NL80211_IFTYPE_AP:
1178 case NL80211_IFTYPE_MESH_POINT:
Johannes Bergac8dd502010-05-05 09:44:02 +02001179 changed |= BSS_CHANGED_BEACON |
1180 BSS_CHANGED_BEACON_ENABLED;
Johannes Berg2d0ddec2009-04-23 16:13:26 +02001181 ieee80211_bss_info_change_notify(sdata, changed);
Johannes Bergf2753dd2009-04-14 10:09:24 +02001182 break;
1183 case NL80211_IFTYPE_WDS:
1184 break;
1185 case NL80211_IFTYPE_AP_VLAN:
1186 case NL80211_IFTYPE_MONITOR:
1187 /* ignore virtual */
1188 break;
1189 case NL80211_IFTYPE_UNSPECIFIED:
Johannes Berg2e161f72010-08-12 15:38:38 +02001190 case NUM_NL80211_IFTYPES:
Johannes Berg2ca27bc2010-09-16 14:58:23 +02001191 case NL80211_IFTYPE_P2P_CLIENT:
1192 case NL80211_IFTYPE_P2P_GO:
Johannes Bergf2753dd2009-04-14 10:09:24 +02001193 WARN_ON(1);
1194 break;
1195 }
1196 }
1197
Johannes Berg2a419052010-06-10 10:21:29 +02001198 /*
1199 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1200 * sessions can be established after a resume.
1201 *
1202 * Also tear down aggregation sessions since reconfiguring
1203 * them in a hardware restart scenario is not easily done
1204 * right now, and the hardware will have lost information
1205 * about the sessions, but we and the AP still think they
1206 * are active. This is really a workaround though.
1207 */
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001208 if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
Johannes Berg2a419052010-06-10 10:21:29 +02001209 mutex_lock(&local->sta_mtx);
1210
1211 list_for_each_entry(sta, &local->sta_list, list) {
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001212 ieee80211_sta_tear_down_BA_sessions(sta);
Johannes Berg2a419052010-06-10 10:21:29 +02001213 clear_sta_flags(sta, WLAN_STA_BLOCK_BA);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001214 }
Johannes Berg2a419052010-06-10 10:21:29 +02001215
1216 mutex_unlock(&local->sta_mtx);
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001217 }
Wey-Yi Guy74e2bd12010-02-03 09:28:55 -08001218
Johannes Bergf2753dd2009-04-14 10:09:24 +02001219 /* add back keys */
1220 list_for_each_entry(sdata, &local->interfaces, list)
Johannes Berg9607e6b2009-12-23 13:15:31 +01001221 if (ieee80211_sdata_running(sdata))
Johannes Bergf2753dd2009-04-14 10:09:24 +02001222 ieee80211_enable_keys(sdata);
1223
1224 ieee80211_wake_queues_by_reason(hw,
1225 IEEE80211_QUEUE_STOP_REASON_SUSPEND);
1226
Johannes Berg5bb644a2009-05-17 11:40:42 +02001227 /*
1228 * If this is for hw restart things are still running.
1229 * We may want to change that later, however.
1230 */
Johannes Bergceb99fe2009-11-19 14:29:39 +01001231 if (!local->suspended)
Johannes Berg5bb644a2009-05-17 11:40:42 +02001232 return 0;
1233
1234#ifdef CONFIG_PM
Johannes Bergceb99fe2009-11-19 14:29:39 +01001235 /* first set suspended false, then resuming */
Johannes Berg5bb644a2009-05-17 11:40:42 +02001236 local->suspended = false;
Johannes Bergceb99fe2009-11-19 14:29:39 +01001237 mb();
1238 local->resuming = false;
Johannes Berg5bb644a2009-05-17 11:40:42 +02001239
1240 list_for_each_entry(sdata, &local->interfaces, list) {
1241 switch(sdata->vif.type) {
1242 case NL80211_IFTYPE_STATION:
1243 ieee80211_sta_restart(sdata);
1244 break;
1245 case NL80211_IFTYPE_ADHOC:
1246 ieee80211_ibss_restart(sdata);
1247 break;
1248 case NL80211_IFTYPE_MESH_POINT:
1249 ieee80211_mesh_restart(sdata);
1250 break;
1251 default:
1252 break;
1253 }
1254 }
1255
1256 add_timer(&local->sta_cleanup);
1257
Johannes Berg34e89502010-02-03 13:59:58 +01001258 mutex_lock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001259 list_for_each_entry(sta, &local->sta_list, list)
1260 mesh_plink_restart(sta);
Johannes Berg34e89502010-02-03 13:59:58 +01001261 mutex_unlock(&local->sta_mtx);
Johannes Berg5bb644a2009-05-17 11:40:42 +02001262#else
1263 WARN_ON(1);
1264#endif
Johannes Bergf2753dd2009-04-14 10:09:24 +02001265 return 0;
1266}
Luis R. Rodriguez42935ec2009-07-29 20:08:07 -04001267
Johannes Berg0f782312009-12-01 13:37:02 +01001268static int check_mgd_smps(struct ieee80211_if_managed *ifmgd,
1269 enum ieee80211_smps_mode *smps_mode)
1270{
1271 if (ifmgd->associated) {
1272 *smps_mode = ifmgd->ap_smps;
1273
1274 if (*smps_mode == IEEE80211_SMPS_AUTOMATIC) {
1275 if (ifmgd->powersave)
1276 *smps_mode = IEEE80211_SMPS_DYNAMIC;
1277 else
1278 *smps_mode = IEEE80211_SMPS_OFF;
1279 }
1280
1281 return 1;
1282 }
1283
1284 return 0;
1285}
1286
1287/* must hold iflist_mtx */
1288void ieee80211_recalc_smps(struct ieee80211_local *local,
1289 struct ieee80211_sub_if_data *forsdata)
1290{
1291 struct ieee80211_sub_if_data *sdata;
1292 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_OFF;
1293 int count = 0;
1294
1295 if (forsdata)
Johannes Berg46a5eba2010-09-15 13:28:15 +02001296 lockdep_assert_held(&forsdata->u.mgd.mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001297
Johannes Berg46a5eba2010-09-15 13:28:15 +02001298 lockdep_assert_held(&local->iflist_mtx);
Johannes Berg0f782312009-12-01 13:37:02 +01001299
1300 /*
1301 * This function could be improved to handle multiple
1302 * interfaces better, but right now it makes any
1303 * non-station interfaces force SM PS to be turned
1304 * off. If there are multiple station interfaces it
1305 * could also use the best possible mode, e.g. if
1306 * one is in static and the other in dynamic then
1307 * dynamic is ok.
1308 */
1309
1310 list_for_each_entry(sdata, &local->interfaces, list) {
Johannes Berg26a58452010-08-27 12:35:55 +02001311 if (!ieee80211_sdata_running(sdata))
Johannes Berg0f782312009-12-01 13:37:02 +01001312 continue;
1313 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1314 goto set;
1315 if (sdata != forsdata) {
1316 /*
1317 * This nested is ok -- we are holding the iflist_mtx
1318 * so can't get here twice or so. But it's required
1319 * since normally we acquire it first and then the
1320 * iflist_mtx.
1321 */
1322 mutex_lock_nested(&sdata->u.mgd.mtx, SINGLE_DEPTH_NESTING);
1323 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
1324 mutex_unlock(&sdata->u.mgd.mtx);
1325 } else
1326 count += check_mgd_smps(&sdata->u.mgd, &smps_mode);
1327
1328 if (count > 1) {
1329 smps_mode = IEEE80211_SMPS_OFF;
1330 break;
1331 }
1332 }
1333
1334 if (smps_mode == local->smps_mode)
1335 return;
1336
1337 set:
1338 local->smps_mode = smps_mode;
1339 /* changed flag is auto-detected for this */
1340 ieee80211_hw_config(local, 0);
1341}
Johannes Berg8e664fb2009-12-23 13:15:38 +01001342
1343static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
1344{
1345 int i;
1346
1347 for (i = 0; i < n_ids; i++)
1348 if (ids[i] == id)
1349 return true;
1350 return false;
1351}
1352
1353/**
1354 * ieee80211_ie_split - split an IE buffer according to ordering
1355 *
1356 * @ies: the IE buffer
1357 * @ielen: the length of the IE buffer
1358 * @ids: an array with element IDs that are allowed before
1359 * the split
1360 * @n_ids: the size of the element ID array
1361 * @offset: offset where to start splitting in the buffer
1362 *
1363 * This function splits an IE buffer by updating the @offset
1364 * variable to point to the location where the buffer should be
1365 * split.
1366 *
1367 * It assumes that the given IE buffer is well-formed, this
1368 * has to be guaranteed by the caller!
1369 *
1370 * It also assumes that the IEs in the buffer are ordered
1371 * correctly, if not the result of using this function will not
1372 * be ordered correctly either, i.e. it does no reordering.
1373 *
1374 * The function returns the offset where the next part of the
1375 * buffer starts, which may be @ielen if the entire (remainder)
1376 * of the buffer should be used.
1377 */
1378size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
1379 const u8 *ids, int n_ids, size_t offset)
1380{
1381 size_t pos = offset;
1382
1383 while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
1384 pos += 2 + ies[pos + 1];
1385
1386 return pos;
1387}
1388
1389size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
1390{
1391 size_t pos = offset;
1392
1393 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
1394 pos += 2 + ies[pos + 1];
1395
1396 return pos;
1397}